Poor credit car finance customers have been warned of the dangers of using their smartphone while behind the wheel.
According to road safety charity Brake, as many as three in ten people check their text messages while driving and nine per cent of people view emails and visit social networking sites behind the wheel.
Research into the impact of sending or receiving text messages among young drivers found the amount of time drivers spent with their eyes off the road increased by up to 400 per cent.
Drivers made 28 per cent more lane excursions and 140 per cent more incorrect lane changes.
Julie Townsend, Brake campaigns director, said: "This kind of irresponsible behaviour is illegal and it kills so there should be no excuses. We are concerned that the increasing uptake of this technology could lead to more crashes and casualties caused by distracted drivers."
Ofcom recently warned that more people in the UK are becoming addicted to their smartphones, with many waking in the night to check their phone.